Table 7.

Proportion of thyme essential oil constituents in different cropping patterns and irrigation levels with AMF application (second year).

No	Components	RIa	LIT RIb	Treatmentsc																		IDd
				Ts M0 I20	Ts M0 I50	Ts M0 I80	Ts M1 I20	Ts M1 I50	Ts M1 I80	50:50 M0 I20	50:50 M0 I50	50:50 M0 I80	50:50 M1 I20	50:50 M1 I50	50:50 M1 I80	66:34 M0 I20	66:34 M0 I50	66:34 M0 I80	66:34 M1 I20	66:34 M1 I50	66:34 M1 I80
1	α-Thujene	921	924	1.02	1.06	0.90	0.80	0.88	0.98	1.05	0.48	1.14	1.26	0.41	1.51	0.98	0.76	1.18	0.44	0.56	1.55	RI-MS
2	α-Pinene	931	932	1.63	0.98	1.16	1.12	0.91	0.99	0.92	0.77	1.01	0.82	0.67	0.91	1.04	0.82	1.11	0.94	0.78	1.08	Std
3	Camphene	944	946	1.47	1.73	1.52	1.79	1.43	1.82	1.48	1.14	1.07	1.45	1.28	1.21	1.38	1.06	1.36	1.52	1.14	1.26	Std
4	Sabinene	968	969	0.46	0.29	0.51	0.69	0.39	0.51	0.61	0.37	0.32	0.72	0.31	0.26	0.83	0.39	0.41	0.18	0.22	0.19	Std
5	1-Octen-3-ol	972	974	0.71	0.55	0.58	0.32	0.21	0.22	0.42	0.38	0.52	0.30	0.17	0.14	0.62	0.53	0.53	0.34	0.13	0.17	RI-MS
6	β-Myrcene	985	988	1.69	1.75	1.68	1.56	1.43	1.62	1.84	1.37	1.59	1.46	1.26	1.57	1.55	1.74	1.62	1.44	1.61	1.48	Std
7	3-Octanol	997	998	tr	0.05	–	tr	–	0.05	–	–	–	–	–	tr	tr	tr	–	0.04	–	tr	RI-MS
8	α-Terpinene	1011	1014	0.93	0.68	0.83	0.81	0.51	0.67	0.79	0.42	0.73	0.45	0.18	0.43	0.64	0.88	0.70	0.46	0.77	0.59	RI-MS
9	p-Cymene	1019	1020	13.07	14.73	14.04	14.48	13.76	14.79	14.86	14.12	15.44	14.09	13.85	16.06	14.89	13.88	15.83	15.34	14.33	16.26	Std
10	Limonene	1022	1024	0.67	0.42	0.54	0.61	0.51	0.79	0.50	0.23	0.61	0.59	0.19	0.72	0.88	0.53	0.43	0.77	0.71	0.52	RI-MS
11	1,8-Cineole	1024	1026	1.16	1.41	1.37	0.97	1.12	1.17	1.19	0.99	1.15	0.83	0.94	0.96	1.27	1.25	0.94	0.90	1.06	0.89	Std
12	γ-Terpinene	1052	1054	16.93	17.96	18.12	18.42	19.06	19.12	17.02	18.46	19.14	18.54	20.88	21.55	17.13	18.73	19.44	19.53	21.37	20.63	Std
13	cis-Sabinene hydrate	1064	1065	0.97	0.94	0.92	1.39	0.86	0.86	1.18	0.69	0.83	0.91	0.68	0.77	0.88	0.88	0.91	0.86	0.85	0.82	RI-MS
14	α-Terpinolene	1066	1068	0.19	0.12	0.15	0.12	0.08	0.07	0.41	0.09	0.11	0.09	0.09	0.03	0.14	0.16	0.06	0.11	0.08	0.04	RI-MS
15	Linalool	1094	1095	1.82	1.59	1.82	2.16	1.86	2.02	1.81	1.68	1.64	1.95	1.88	1.85	1.87	1.46	1.56	2.06	1.93	1.79	Std
16	Camphor	1137	1141	0.42	0.20	0.26	0.22	0.11	0.22	0.19	0.19	0.20	0.19	0.09	0.07	0.18	0.19	0.20	0.18	0.06	0.08	RI-MS
17	Borneol	1161	1165	1.94	2.12	1.67	1.85	1.37	1.04	2.11	1.67	1.64	1.49	1.15	1.23	2.09	1.49	1.58	1.61	1.02	1.09	Std
18	Terpinen-4-ol	1171	1174	0.53	0.39	0.26	0.52	0.19	0.16	0.93	0.34	0.31	0.46	0.07	0.21	0.73	0.34	0.21	0.29	0.23	0.09	RI-MS
19	Carvacrol, methyl ether	1238	1241	0.82	0.92	0.77	0.59	0.38	0.43	0.78	0.96	0.89	0.48	0.53	0.31	0.78	0.95	0.82	0.37	0.41	0.62	RI–MS
20	Geranial	1260	1264	0.29	0.18	0.13	0.12	0.07	0.06	0.09	tr	0.08	0.09	–	tr	0.09	0.05	0.07	0.09	0.05	–	RI-MS
21	Thymol	1287	1289	40.89	42.23	42.46	41.17	47.29	44.09	41.32	46.05	44.12	42.71	48.59	43.13	42.28	42.66	42.56	43.87	44.58	43.16	Std
22	Carvacrol	1297	1298	2.95	3.62	3.51	3.03	3.16	3.88	3.42	3.58	3.68	3.33	3.52	3.77	3.01	3.91	3.33	3.13	3.46	4.06	Std
23	Thymol acetate	1347	1349	0.08	0.06	0.06	0.11	0.12	0.14	0.12	0.11	0.38	0.12	0.20	0.13	0.02	0.13	0.07	0.09	0.13	0.15	RI-MS
24	(E)-Caryophyllene	1415	1417	1.72	1.27	0.93	2.19	1.65	0.92	1.49	0.59	0.99	2.13	1.82	1.37	1.58	1.26	1.06	2.26	1.11	1.62	Std
25	α-Humulene	1451	1452	0.09	0.05	0.04	–	–	–	0.05	tr	–	0.11	tr	–	–	tr	–	–	–	–	RI-MS
26	Germacrene D	1481	1484	0.72	0.86	0.41	0.27	0.12	0.45	0.87	0.29	0.23	0.59	0.06	0.23	0.94	0.41	0.32	0.15	0.11	0.12	RI-MS
27	δ-Cadinene	1521	1522	1.19	0.63	0.92	0.33	0.16	0.14	0.42	0.26	0.18	0.34	0.12	0.18	0.42	0.37	0.24	0.42	0.06	0.24	RI-MS
28	Caryophyllene oxide	1581	1582	1.68	0.94	1.48	0.69	0.62	0.76	1.26	0.76	1.06	0.71	0.59	0.36	1.04	1.15	1.23	0.88	0.81	0.73	Std
29	β-Bisabolene	1766	1768	0.08	0.04	tr	–	–	0.05	0.05	–	tr	–	–	–	tr	0.04	–	–	–	–	RI-MS
Total identified (%)				97.14	99.08	98.06	97.10	98.25	99.02	97.18	98.16	99.09	97.21	98.56	99.13	97.32	98.01	99.77	98.27	99.57	99.25
Grouped compounds (%)
Monoterpene hydrocarbons				37.87	39.91	39.3	40.28	41.86	41.29	38.07	37.36	41.05	39.38	39.03	44.06	38.32	40.79	42.08	40.62	43.49	43.56
Oxygenated monoterpenes				53.06	54.78	54.38	53.25	53.61	55.14	54.55	56.39	55.03	53.65	56.74	52.76	54.34	53.48	52.31	53.56	53.86	52.79
Sesquiterpene hydrocarbons				3.80	2.85	2.32	2.54	1.95	1.56	2.88	1.17	1.43	3.17	2.03	1.78	2.96	2.04	1.62	2.83	1.28	1.98
Oxygenated sesquiterpenes				1.68	0.94	1.48	0.69	0.62	0.76	1.26	0.76	1.06	0.71	0.59	0.36	1.04	1.15	1.23	0.88	0.81	0.73
Others				0.73	0.60	0.58	0.34	0.21	0.27	0.42	0.38	0.52	0.3	0.17	0.17	0.66	0.55	0.53	0.38	0.13	0.19

^aRI, linear retention indices on DB-5 MS column, experimentally determined using homologue series of n-alkanes0

^bRelative retention indices taken from Adams.

^cTs, 50:50 and 66:34 indicating thyme sole culture and intercropping ratio of thyme with soybean; I₂₀, I₅₀ and I₈₀ indicating non-stressed, moderate and severe water deficit levels; M₀: non-usage of AMF, M₁: usage of AMF.

^dIdentification methods: MS, by comparison of the mass spectrum with those of the computer mass libraries Wiley, Adams and NIST 08; RI, by comparison of retention index with those reported in Adams and NIST 08; Std, by comparison of the retention time and mass spectrum of available authentic standard. Bold values show the major constituents of thyme essential oil.